1.
For every positive even integer n, the function h(n) is defined to be the product of all the even integers from 2 to n,inclusive. If p is the smallest prime factor of h(100)+1, then p is
-Between 2 and 10
-Between 10 and 20
-Between 20 and 30
-Between 30 and 40
-Greater than 40
2.
According to the directions on a can of frozen orange juice concentrate,1 can of concentrate is to be mixed with 3 cans of water to make orange juice. How many 12-ounce cans of the concentrate are required to prepare 200 6-ounce serving of orange juice?
- 25
- 34
- 50
- 67
- 100
3.
If each term in the sum a1+ a2+ …….an is either 7 or 77 and the sum equals 350, which of the following could be equal to n?
- 38
- 39
- 40
- 41
- 42
4.
For which of the following functions is f(a+b)=f(a)+f(b)for all positive numbers a and b?
- f(x)=x^2
- f(x)=x+1
- f(x)=√x
- f(x)=2/x
- f(x)= -3x
5.
A certain library assesses fines for overdue books as follows. On the first day that a book is overdue, the total fine is $0.10. for each additional day that the book is overdue, the total fine is either increased by $0.30 or doubled, whichever results in the lesser amount. What is the total fine for a book on the fourth day it is overdue?
- $0.60
- $0.70
- $0.80
- $0.90
- $1.00
6.
of the students who eat in a certain cafeteria, each student either likes or dislikes lima beans and each student either likes or dislikes Brussels sprouts. Of these students, 2/3 dislike lima beans; and of those who dislike lima beans, 3/5 also dislike Brussels sprouts. How many of the students like Brussels sprouts but dislike lima beans?
(1) 120 students eat in the cafeteria
(2) 40 of the students like lima beans
KEY
7.
in the rectangular coordinate system, are the points(r,s) and (u,v)equidistant from the origin?
(1) r+s=1
(2) u=1-r and v=1-s
KEY:C
8.
In the figures above, if the area of the triangle on the right is twice the area of the triangle on the left, then in term of s, S=√2s
两个三角形，左边的底边为s 右边的底边为S,他们的内角都相等
没想通？
9.
In May Mrs.Lee’s earnings were 60% of the Lee family’s total income. In June Mrs.Lee earned 20% more than in May. If the rest of the family’s income was the same both months, then, in June, Mrs.Lee’s earnings were approximately what percent of the Lee family’s total income?
- 64%
- 68%
- 72%
- 76%
- 80%
怎么算都是72%
10.
Store S sold a total of 90 copies of a certain book during the seven days of last week, and it sold different numbers of copies on any two of the days. If for the seven days store S sold the greatest number of copies on Saturday and the second greatest number of copies on Friday, did Store S sell more that 11 copies on Friday? (1) Last week Store S sold 8 copies of the book on Thursday.
(2) Last week Store S sold 38 copies of the book on Saturday.
11.
Is the integer n odd?
(1) n is divisible by 3
(2) 2n is divisible by twice as many positive integers as n
KEY: B
12.
Working alone at its own constant rate, a machie seals k cartons in 8 hours, and working alone at its own constant rate, a second machine seals k cartons in 4 hours. If the two machine, each working at its own constant rate and for the same period of time, together sealed a certain of cartons, what percent of the cartons were sealed by the machine working at the faster rate?
- 25%
- (33*1/3)%
- 50%
- (66*2/3)%
- 75%
请好心人能给与解答，呵呵，
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